Digital Signal Processing Handbook P35

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Digital Signal Processing Handbook P35

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Filter Banks and Wavelets The methods of designing bases that we will employ draw on ideas first used in the construction of multirate filter banks. The idea of such systems is to take an input system and split it into subsequences using banks of filters. This simplest case involves splitting into just two parts using a structure such as that shown in Fig. 35.1. This technique has a long history of use in the area of subband coding: first of speech [1, 2] and more recently of images [3, 4]. In fact, the most successful image coding schemes are based on...

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